On April 30.1939 ; The 1939-40 New York World's Fair opens. source
On April 30.1939 ; The 1939-40 New York World's Fair opens.
In 1944 Chen-Ning Yang received his master's degree from Tsinghua University, which had moved to Kunming during the Sino-Japanese War (1937-1945). source
In 1944 Chen-Ning Yang received his master's degree from Tsinghua University, which had moved to Kunming during the Sino-Japanese War (1937-1945).
The stratosphere is stratified in temperature, with warmer layers higher and cooler layers closer to the Earth. source
The stratosphere is stratified in temperature, with warmer layers higher and cooler layers closer to the Earth.
A large, crow-sized falcon, The peregrine falcon has a blue-grey back, barred white underparts, and a black head. source
A large, crow-sized falcon, The peregrine falcon has a blue-grey back, barred white underparts, and a black head.
Caterpillars have 12 eyes. source
Caterpillars have 12 eyes.
Approximately 23,000 Gypsies had been brought to Auschwitz by 1944, 20,000 of whom died there. source
Approximately 23,000 Gypsies had been brought to Auschwitz by 1944, 20,000 of whom died there.
Benedict Arnold received a commission as a brigadier general in the British Army, an annual pension of £360, and a lump sum of over £6,000. source
Benedict Arnold received a commission as a brigadier general in the British Army, an annual pension of £360, and a lump sum of over £6,000.
The head South American gray fox is reddish-brown flecked with white. source
The head South American gray fox is reddish-brown flecked with white.
In 1899, Emile Berliner wrote a book, Conclusions that speaks of his agnostic ideas on religion and philosophy. source
In 1899, Emile Berliner wrote a book, Conclusions that speaks of his agnostic ideas on religion and philosophy.
Caesar's assassination caused political and social turmoil in Rome; without the dictator's leadership, the city was ruled by his friend and colleague, Mark Antony source
Caesar's assassination caused political and social turmoil in Rome; without the dictator's leadership, the city was ruled by his friend and colleague, Mark Antony
The United States Census Bureau estimates that the population of Colorado was 5,540,545 on July 1, 2016, an increase of 10.17% since the 2010 United States Census. source
The United States Census Bureau estimates that the population of Colorado was 5,540,545 on July 1, 2016, an increase of 10.17% since the 2010 United States Census.
In the wild, rose-ringed parakeets usually feed on buds, fruits, vegetables, nuts, berries, and seeds. source
In the wild, rose-ringed parakeets usually feed on buds, fruits, vegetables, nuts, berries, and seeds.
On May 31.1985 ; United States–Canada tornado outbreak: Forty-one tornadoes hit Ohio, Pennsylvania, New York, and Ontario, leaving 76 dead. source
On May 31.1985 ; United States–Canada tornado outbreak: Forty-one tornadoes hit Ohio, Pennsylvania, New York, and Ontario, leaving 76 dead.
On January 13.1895 ; First Italo-Ethiopian War: the war's opening battle, the Battle of Coatit, occurs; it is an Italian victory. source
On January 13.1895 ; First Italo-Ethiopian War: the war's opening battle, the Battle of Coatit, occurs; it is an Italian victory.
Evan G. Greenberg is the former chairman and CEO of American International Group (AIG). source
Evan G. Greenberg is the former chairman and CEO of American International Group (AIG).
After further study, Henrietta Swan Leavitt confirmed in 1912 thаt the Cерhеid vаriаblеѕ with grеаtеr intrinsic luminоѕitу did hаvе lоngеr periods, аnd thаt the rеlаtiоnѕhiр wаѕ quite сlоѕе аnd рrеdiсtаblе. source
After further study, Henrietta Swan Leavitt confirmed in 1912 thаt the Cерhеid vаriаblеѕ with grеаtеr intrinsic luminоѕitу did hаvе lоngеr periods, аnd thаt the rеlаtiоnѕhiр wаѕ quite сlоѕе аnd рrеdiсtаblе.
On September 14.1960 ; The Organization of Petroleum Exporting Countries (OPEC) is founded. source
On September 14.1960 ; The Organization of Petroleum Exporting Countries (OPEC) is founded.
In 1849, Georg Ohm published Beiträge zur Molecular-Physik, (in English: Molecular Physics). source
In 1849, Georg Ohm published Beiträge zur Molecular-Physik, (in English: Molecular Physics).
The Indian pond heron's feeding habitat is marshy wetlands. source
The Indian pond heron's feeding habitat is marshy wetlands.
On February 19.1985 ; William J. Schroeder becomes the first recipient of an artificial heart to leave hospital. source
On February 19.1985 ; William J. Schroeder becomes the first recipient of an artificial heart to leave hospital.
